Universität zu Köln

Ando, H., Shiota, D., Imamura, T., Tokumaru, M., Asai, A., Isobe, H., Paezold, M., Haeusler, B. and Nakamura, M. (2015). Internal structure of a coronal mass ejection revealed by Akatsuki radio occultation observations. J. Geophys. Res-Space Phys., 120 (7). S. 5318 - 5329. WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 2169-9402

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Abstract

A coronal mass ejection (CME) was observed at the heliocentric distance of 12.7R(upsilon) by radio occultation measurements using the Akatsuki spacecraft. The temporal developments of the bulk velocity and the electron column density along the raypath traversing the CME were obtained, and under the assumption that the irregularities are transported across the raypath, the internal structure of the CME covering the region from the core to the tail was retrieved. The suggested internal structure was compared with Large Angle Spectroscopic Coronagraph images, a numerical study and previous radio occultation observations of CMEs to propose a CME model; the bulk velocity and the electron density have relatively large values in the core, decrease behind the core, and increase again in the tail region where the fast plasma flow associated with the magnetic reconnection converges. This implies that the magnetic reconnection behind the CMEs might continue up to at least the heliocentric distance of approximate to 13R(upsilon).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ando, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Shiota, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Imamura, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tokumaru, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Asai, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Isobe, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paezold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haeusler, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nakamura, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-399249
DOI:	10.1002/2015JA021076
Journal or Publication Title:	J. Geophys. Res-Space Phys.
Volume:	120
Number:	7
Page Range:	S. 5318 - 5329
Date:	2015
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	2169-9402
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SOLAR-WIND; WHITE-LIGHT; SCINTILLATION MEASUREMENTS; DENSITY-FLUCTUATIONS; POWER SPECTRUM; VENUS ORBITER; SPACECRAFT; SUN; IONOSPHERE; SCATTERING Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39924